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diff --git a/tests/test-clock.cpp b/tests/test-clock.cpp
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+/*
+ * Copyright 2013 Canonical Ltd.
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 3, as published
+ * by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranties of
+ * MERCHANTABILITY, SATISFACTORY QUALITY, or FITNESS FOR A PARTICULAR
+ * PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Authors:
+ *   Charles Kerr <charles.kerr@canonical.com>
+ */
+
+#include <datetime/clock.h>
+#include <datetime/timezones.h>
+
+#include "test-dbus-fixture.h"
+
+/***
+****
+***/
+
+using namespace unity::indicator::datetime;
+
+class ClockFixture: public TestDBusFixture
+{
+  private:
+    typedef TestDBusFixture super;
+
+  public:
+    void emitPrepareForSleep()
+    {
+      g_dbus_connection_emit_signal(g_bus_get_sync(G_BUS_TYPE_SYSTEM, nullptr, nullptr),
+                                    NULL,
+                                    "/org/freedesktop/login1", // object path
+                                    "org.freedesktop.login1.Manager", // interface
+                                    "PrepareForSleep", // signal name
+                                    g_variant_new("(b)", FALSE),
+                                    NULL);
+    }
+};
+
+TEST_F(ClockFixture, MinuteChangedSignalShouldTriggerOncePerMinute)
+{
+    // start up a live clock
+    std::shared_ptr<Timezones> zones(new Timezones);
+    zones->timezone.set("America/New_York");
+    LiveClock clock(zones);
+    wait_msec(500); // wait for the bus to set up
+
+    // count how many times clock.minute_changed() is emitted over the next minute
+    const DateTime now = clock.localtime();
+    const auto gnow = now.get();
+    auto gthen = g_date_time_add_minutes(gnow, 1);
+    int count = 0;
+    clock.minute_changed.connect([&count](){count++;});
+    const auto msec = g_date_time_difference(gthen,gnow) / 1000;
+    wait_msec(msec);
+    EXPECT_EQ(1, count);
+    g_date_time_unref(gthen);
+}
+
+/***
+****
+***/
+
+#define TIMEZONE_FILE (SANDBOX"/timezone")
+
+TEST_F(ClockFixture, HelloFixture)
+{
+    std::shared_ptr<Timezones> zones(new Timezones);
+    zones->timezone.set("America/New_York");
+    LiveClock clock(zones);
+}
+
+
+TEST_F(ClockFixture, TimezoneChangeTriggersSkew)
+{
+    std::shared_ptr<Timezones> zones(new Timezones);
+    zones->timezone.set("America/New_York");
+    LiveClock clock(zones);
+
+    auto tz_nyc = g_time_zone_new("America/New_York");
+    auto now_nyc = g_date_time_new_now(tz_nyc);
+    auto now = clock.localtime();
+    EXPECT_EQ(g_date_time_get_utc_offset(now_nyc), g_date_time_get_utc_offset(now.get()));
+    EXPECT_LE(abs(g_date_time_difference(now_nyc,now.get())), G_USEC_PER_SEC);
+    g_date_time_unref(now_nyc);
+    g_time_zone_unref(tz_nyc);
+
+    /// change the timezones!
+    clock.minute_changed.connect([this](){
+                   g_main_loop_quit(loop);
+               });
+    g_idle_add([](gpointer gs){
+                   static_cast<Timezones*>(gs)->timezone.set("America/Los_Angeles");
+                   return G_SOURCE_REMOVE;
+               }, zones.get());
+    g_main_loop_run(loop);
+
+    auto tz_la = g_time_zone_new("America/Los_Angeles");
+    auto now_la = g_date_time_new_now(tz_la);
+    now = clock.localtime();
+    EXPECT_EQ(g_date_time_get_utc_offset(now_la), g_date_time_get_utc_offset(now.get()));
+    EXPECT_LE(abs(g_date_time_difference(now_la,now.get())), G_USEC_PER_SEC);
+    g_date_time_unref(now_la);
+    g_time_zone_unref(tz_la);
+}
+
+/**
+ * Confirm that a "PrepareForSleep" event wil trigger a skew event
+ */
+TEST_F(ClockFixture, SleepTriggersSkew)
+{
+    std::shared_ptr<Timezones> zones(new Timezones);
+    zones->timezone.set("America/New_York");
+    LiveClock clock(zones);
+    wait_msec(500); // wait for the bus to set up
+
+    bool skewed = false;
+    clock.minute_changed.connect([&skewed, this](){
+                    skewed = true;
+                    g_main_loop_quit(loop);
+                    return G_SOURCE_REMOVE;
+                });
+
+    g_idle_add([](gpointer gself){
+                   static_cast<ClockFixture*>(gself)->emitPrepareForSleep();
+                   return G_SOURCE_REMOVE;
+                }, this);
+
+    g_main_loop_run(loop);
+    EXPECT_TRUE(skewed);
+}